The stability assessment of the complex salt cavities, placed inside the salt rock mass, represents a real scientific and technical challenge for any researcher focused on the geomechanics field. The purpose of this paper is 3D stability modelling for the Praid salt mines, Romania, taking into account the salt cavities mining dynamics and also the intrinsic parameters’ effect over the salt rock...

To study the occurrence process, as well temporal and spatial evolution laws, of rockburst disasters, roof deformation continuous heading roadways during was studied through a physical similarity simulation test with high ratio low strength. The failure law roadway in process were analyzed by using detection systems, including strain acquisition system high-power digital micro-imaging system. r...

In view of the problems associated with poor stability coal walls, slide and leakage top-coal at tunnel excavation working face under a soft extra-thick roof, surrounding rock must be strengthened. The theoretical analysis pressure, numerical simulation other methods were comprehensively used to study coal-wall-slicing mechanism. Given characteristics combined supporting technology “coal wall w...

In this paper, to identify the roof unconfined compressive strength (UCS) in process of coal mine roadway support real-time and optimize drilling speed while drilling, paper proposes establishes a test method for assessing uniaxial roof. This can be used drilling. Moreover, mathematical model power output is developed roof-strata identification system with system. The results were as follows: (...

In order to sustainably use coal resources and reduce mine accidents, the stability evaluation of roadway roofs is particularly important. The existing methods roof control application are greatly disjointed, relationship between early warning ignored, an intelligent calculation system lacking. Based on successful roof-cutting non-pillar mining method in various engineering geology conditions, ...

In order to solve the problem of serious deformation and failure surrounding rock difficult maintenance gob-side entries with strong mining-induced small coal pillars, taking A110607 return airway Shanwenjiaba Coal Mine as engineering background, key parameters roof-cutting pressure relief control technology for roadway excavation pillars were studied by using two-way concentrated blasting tech...

In the mining of close coal seam, stress concentration under residual pillar in upper seam leads to serious deformation roadway surrounding rock lower seam. Hence, it poses a huge challenge maintenance entry rock. Based on this, an approach control technology, directional pre-splitting, and roof-cutting pressure relief, was applied. The utilizing pre-splitting relief were studied by numerical s...